package com.nbgroup.utils;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.*;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Created by 顾志杰 on 2018/2/11.
 */
@Component
public class InputExcel {
    private String getCellValue(Cell cell) {
        String cellValue = "";
        if(cell == null){
            return cellValue;
        }
        //判断数据的类型
        switch (cell.getCellType()){
            case Cell.CELL_TYPE_NUMERIC: //数字
                cellValue = stringDateProcess(cell);
                break;
            case Cell.CELL_TYPE_STRING: //字符串
                cellValue = String.valueOf(cell.getStringCellValue());
                break;
            case Cell.CELL_TYPE_BOOLEAN: //Boolean
                cellValue = String.valueOf(cell.getBooleanCellValue());
                break;
            case Cell.CELL_TYPE_FORMULA: //公式
                cellValue = String.valueOf(cell.getCellFormula());
                break;
            case Cell.CELL_TYPE_BLANK: //空值
                cellValue = "";
                break;
            case Cell.CELL_TYPE_ERROR: //故障
                cellValue = "非法字符";
                break;
            default:
                cellValue = "未知类型";
                break;
        }
        return cellValue;
    }

    private String stringDateProcess(Cell cell) {
        String result = new String();
        if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
            SimpleDateFormat sdf = null;
            if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
                sdf = new SimpleDateFormat("HH:mm");
            } else {// 日期
                sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
            }
            Date date = cell.getDateCellValue();
            result = sdf.format(date);
        } else if (cell.getCellStyle().getDataFormat() == 58) {
            // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
            double value = cell.getNumericCellValue();
            Date date = DateUtil
                    .getJavaDate(value);
            result = sdf.format(date);
        } else {
            double value = cell.getNumericCellValue();
            CellStyle style = cell.getCellStyle();
            DecimalFormat format = new DecimalFormat();
            String temp = style.getDataFormatString();
            // 单元格设置成常规
            if (temp.equals("General")) {
                format.applyPattern("#");
            }
            result = format.format(value);
        }

        return result;
    }

    private Workbook getWorkBook(MultipartFile mFile) {
        //获得文件名
        String fileName = mFile.getOriginalFilename();
        //创建Workbook工作薄对象，表示整个excel
        Workbook workbook = null;

        try {
            //获取excel文件的io流
            InputStream is = mFile.getInputStream();
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
            workbook=WorkbookFactory.create(is);
//            if(fileName.endsWith("xls")){
//                //2003
//                workbook = new HSSFWorkbook(is);
//            }else if(fileName.endsWith("xlsx")){
//                //2007 及2007以上
//                workbook = new XSSFWorkbook(is);
//            }
        } catch (IOException e) {
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        }
        return workbook;
    }
    public List<String[]> getExcelList(MultipartFile mFile){
        Workbook workbook =getWorkBook(mFile);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List<String[]> list = new ArrayList<String[]>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue;
                }
                //获得当前sheet的开始行
                int firstRowNum  = sheet.getFirstRowNum();
                //获得当前sheet的结束行
                int lastRowNum = sheet.getLastRowNum();
                //匹配第一行是否跟导入模版匹配
                //循环除了第一行的所有行
                for(int rowNum = firstRowNum;rowNum <= lastRowNum;rowNum++){
                    //获得当前行
                    try {
                        Row row = sheet.getRow(rowNum);
                        if(row == null){
                            continue;
                        }
                        //获得当前行的开始列
                        int firstCellNum = row.getFirstCellNum();
                        //获得当前行的列数
                        int lastCellNum = row.getLastCellNum();
                        String[] cells = new String[row.getLastCellNum()];
                        //循环当前行
                        for(int cellNum = 0; cellNum < lastCellNum;cellNum++){
                            Cell cell = row.getCell(cellNum);
                            cells[cellNum] =getCellValue(cell);
                        }
                        list.add(cells);
                    }catch (Exception e)
                    {
                        continue;
                    }

                }
            }
        }
        return list;
    }

}
